Nuclide reference
Al-26 — Aluminium-26
The half-life of Al-26 is 717,000 years. Main decay mode: β⁺ decay / electron capture to Mg-26 (100%).
Identification
- Element
- Aluminium (Al)
- Atomic number Z
- 13
- Mass number A
- 26
- State
- Radioactive
Key quantities
- Half-life
- 717,000 years
- Specific activity
- 709,500,000 Bq/g
- Gamma constant Γ
- —
- A1 / A2 for transport (SSR-6, НП-053-16)
- 0.1 TBq / 0.1 TBq
- D-value (НП-067-24)
- 0.03 TBq
Decay modes
- β⁺ decay / electron capture → Mg-26 — 100 %
Main gamma lines
| Energy, keV | Yield, % |
|---|---|
| 510.999 · annihilation 511 keV | 163.5 |
| 1,808.65 | 99.76 |
| 1,129.67 | 2.5 |
| 1.23826 · X-ray line | 0.3074 |
| 2,938 | 0.24 |
| 1.23795 · X-ray line | 0.1547 |
Lines of the bare nuclide (ENDF/B-VIII.0), without daughter ingrowth.
Alpha and beta particles
| Radiation | Energy, keV | Yield, % |
|---|---|---|
| β⁺, E max | 1,173.7 | 81.74 |
For β⁺ the endpoint (maximum) energy of the spectrum is given. ENDF/B-VIII.0.
Related calculators
Reference data vs computed valuesHalf-life, gamma lines and D-value are reference data (ENDF/B-VIII.0, НП-067-24).Gamma constant Γ is H*(10) at 1 m computed from ICRP-107 spectra (NIST µ_en/ρ, ICRP-74 Table A.21) including short-lived progeny in equilibrium (e.g. Cs-137/Ba-137m, Ra-226 series); specific activity uses molar mass M ≈ mass number A.K-series X-ray energies are from NIST SRD 128 (Deslattes et al., 2003): in ENDF/B-VIII.0 they are given to 1 % and shifted by up to 0.7 keV for heavy elements. L-series lines and all yields are ENDF/B-VIII.0.